Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Cammarota, Chiara"'
Autor:
Serricchio, Ludovica, Bocchi, Dario, Chilin, Claudio, Marino, Raffaele, Negri, Matteo, Cammarota, Chiara, Ricci-Tersenghi, Federico
To improve the storage capacity of the Hopfield model, we develop a version of the dreaming algorithm that perpetually reinforces the patterns to be stored (as in the Hebb rule), and erases the spurious memories (as in dreaming algorithms). For this
Externí odkaz:
http://arxiv.org/abs/2405.08777
We provide an analytical study of the evolution of the Hessian during gradient descent dynamics, and relate a transition in its spectral properties to the ability of finding good minima. We focus on the phase retrieval problem as a case study for com
Externí odkaz:
http://arxiv.org/abs/2403.02418
Publikováno v:
J. Phys. Complex. 5, 015017 (2024)
We study the spectral properties of sparse random graphs with different topologies and type of interactions, and their implications on the stability of complex systems, with particular attention to ecosystems. Specifically, we focus on the behaviour
Externí odkaz:
http://arxiv.org/abs/2303.09897
The idea that a thermodynamic glass transition of some sort underlies the observed glass formation has been highly debated since Kauzmann first stressed the hypothetical entropy crisis that could take place if one were able to equilibrate supercooled
Externí odkaz:
http://arxiv.org/abs/2209.11049
In modern society people are being exposed to numerous information, with some of them being frequently repeated or more disruptive than others. In this paper we use a model of opinion dynamics to study how this news impact the society. In particular,
Externí odkaz:
http://arxiv.org/abs/2011.02445
Publikováno v:
Phys. Rev. E 105, 014305 (2022)
We analyse the stability of linear dynamical systems defined on sparse, random graphs with predator-prey, competitive, and mutualistic interactions. These systems are aimed at modelling the stability of fixed points in large systems defined on comple
Externí odkaz:
http://arxiv.org/abs/2009.11211
Properties of equilibria and glassy phases of the random Lotka-Volterra model with demographic noise
Publikováno v:
Phys. Rev. Lett. 126, 258301 (2021)
In this letter we study a reference model in theoretical ecology, the disordered Lotka-Volterra model for ecological communities, in the presence of finite demographic noise. Our theoretical analysis, which takes advantage of a mapping to an equilibr
Externí odkaz:
http://arxiv.org/abs/2009.10565
Autor:
Mannelli, Stefano Sarao, Biroli, Giulio, Cammarota, Chiara, Krzakala, Florent, Urbani, Pierfrancesco, Zdeborová, Lenka
Publikováno v:
Advances in Neural Information Processing Systems, v22, page 3265--327, 2020
Despite the widespread use of gradient-based algorithms for optimizing high-dimensional non-convex functions, understanding their ability of finding good minima instead of being trapped in spurious ones remains to a large extent an open problem. Here
Externí odkaz:
http://arxiv.org/abs/2006.06997
Publikováno v:
J. Phys. A: Math. Theor. 53 375006 (2020)
Dynamical Mean-Field Theory (DMFT) replaces the many-body dynamical problem with one for a single degree of freedom in a thermal bath whose features are determined self-consistently. By focusing on models with soft disordered $p$-spin interactions, w
Externí odkaz:
http://arxiv.org/abs/2005.05118
In order to understand the development of common orientation of opinions in the modern world we propose a model of a society described as a large collection of agents that exchange their expressed opinions under the influence of their mutual interact
Externí odkaz:
http://arxiv.org/abs/1909.12590